Rotor assembly

Abstract

A rotor assembly includes a hub and a hood. The hub provides a shoulder wall extending the center thereof and a hub wall connecting the shoulder wall. The hood provides a top wall and a lateral wall connecting the top wall. The shoulder wall of the hub has a fixing part disposed next to the end thereof and the top wall of the hood provides a through hole fitting with the fixing part such that the hub mounts to the outer surface of the hood.

1. A rotor assembly, comprising:
 a hub with a U-shaped cross section; 
 a hood with a U-shaped cross section, the outer periphery thereof being joined to the inner surface of the hub; 
 a rotor, being attached to an inner lateral wall surface of the hood; 
 a motor base, supporting a motor shaft; 
 a stator, being mounted to the base and surrounding the motor shaft; 
 characterized in that the top of the hub provides an large opening to form a hollow space with at least a fixing part extending downward from the top thereof at the edge of the opening and the lower end of the fixing part is a hook end; the hood provides a central hole at the top thereof for being penetrated by the motor shaft and has at least a through hole corresponding to the fixing part at the top thereof for the fixing part passing through and holding the top of the hood with the hook end.